A tricky Commodore PET repair: tracking down 6 1/2 bad chips

A vintage Commodore PET computer was repaired after extensive troubleshooting revealed multiple faulty chips. The restoration required replacing two failed ROM chips and four bad RAM chips, with one ROM adapter board initially causing issues due to under-powered programming. Using tools like a logic analyzer and Retro Chip Tester helped diagnose the problems in the 1977 home computer.